["The BF4S0 module is a 4 port BRI / ISDN module for the berofix gateways. Each individual port of the BF4S0 can be operated individually in NT (Network Termination) or TE (Terminal Equipment) mode. In both modes, the individual ports can be operated both point-to-point (PTP point-to-point connection) and point-to-multipoint (PMP point-to-point connection). Switching between the respective operating modes and the terminating resistors for each individual port is done in software (Jumper Free) via the berofix GUI. The annoying jumping around of the modules is therefore unnecessary. Specifications", "4 BRI (S0) ISDN ports", "Each port is configurable in NT or TE mode with PIN interchanging", "Terminating resistor (100 ohm) can be set individually for each port", "TE/NT and termination per port can be changed in software (jumper-free)", "Layer 2 is Q.921 and Layer 3 is Q.931 (EuroISDN DSS1) compatible", "DSS1 feature set: CLIP/No-Screening, CLIR, COLP, UUS, MCID, CD, CNIP", "Q.SIG Feature Set: CNIP", "Dimensions: 105 x 46 x 9mm", "Weight: < 40g", "Operating range: 0-70°C", "CE and TBR-3 compliance (ISDN BRI)"]